Record Ozone Hole Over the Arctic Has Closed

An unusual phenomenon happened in March and April when an enormous hole in the ozone layer formed over the Arctic. Last week, though, scientists tracking the hole noticed that it has closed, as CNN reported. Unlike the infamous hole in the ozone over Antarctica, which was caused by overuse of now illegal chemicals containing chlorofluorocarbons, the hole in the Arctic was caused by a combination of factors, including low Arctic temperatures, sunlight, pollutants and a particularly strong polar vortex, according to the Copernicus' Atmospheric Monitoring Service (CAMS), as CNN reported. Read more....